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Normalize file extensions (capital vs small letters; jpg vs jpeg) for new uploads on Commons
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Description

https://commons.wikimedia.org/wiki/Commons:Village_pump/Proposals/Archive/2018/12#Normalize_file_extensions_for_new_uploads

This proposal to change .JPG, .Jpg, .jpeg, .JpEg etc all to .jpg for new uploads has been accepted. The same for .tiff, .tif, .TIF etc to .tif. For all other extensions, none should have uppercase characters anymore.

When a user tries to upload a file with (for example) a .JPG extension, the extension should be changed to .jpg, preferably in silence. The file upload should not be denied.

If possible (I don't know how complicated this would be), it would also be nice if a message like "File extension automatically changed from JPEG to jpg" could be appended to the upload/edit comment. No showstopper if this is not possible, but it would be nice.


See Also:
T36703: Normalize file extension while uploading file in UploadWizard (only concerns UploadWizard)
T34660: File extensions for the same file type should not allow variations of a file name (File:X.jpg, File:X.jpeg, File:X.JPG should all refer to the same file) (only appears to concern enwiki)
T42326: File extension letter case treatment should be unified on Commons (closed because T36703 was closed)
T31284: Upload form should change file extensions to the canonical form automatically (lowercase, jpeg→jpg etc.)
T213484: Normalize file extensions (capital vs small letters; jpg vs jpeg) for new uploads on Commons
T144593: File extension changes automatically while moving ogg audio file on Commons, caused by a gadget
T42479: File extensions should be automatically decided by MIME type at upload

Event Timeline

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptJan 10 2019, 8:58 PM
AlexisJazz updated the task description. (Show Details)Jan 10 2019, 9:00 PM
4nn1l2 added a subscriber: 4nn1l2.Jan 11 2019, 4:27 AM
Aklapper renamed this task from Normalize file extensions for new uploads on Commons to Normalize file extensions (capital vs small letters; jpg vs jpeg) for new uploads on Commons.Jan 11 2019, 1:39 PM
Aklapper edited projects, added MediaWiki-Uploading; removed Multimedia.
Restricted Application added a project: Multimedia. · View Herald TranscriptJan 11 2019, 1:39 PM

JS is client side, all upload methods should result in normalized file extensions. Uploading example.JpG shouldn't be possible, at all.